Digital-based interleaving control for GaN-based MHz CRM totem-pole PFC

In this paper, the performance of different interleaving control methods for gallium-nitride (GaN) devices based MHz critical conduction mode (CRM) totem-pole power factor correction (PFC) circuit is compared. Both closed-loop interleaving and open-loop interleaving are good for low frequency CRM PFC; but for MHz very high frequency CRM PFC with microcontroller (MCU) implementation, open-loop interleaving outperforms closed-loop interleaving with small and non-amplified phase error. After software optimization, the phase error of open-loop interleaving is smaller than 3 degree at 1MHz, when the control is implemented by 60MHz low cost MCU. Significant ripple cancellation effect and differential-mode (DM) filter size reduction is achieved with good interleaving. For a 1.2kW MHz totem-pole PFC, the DM filter size is reduced to one quarter compared to the counterpart of a 100kHz PFC. Last but not least, the stability of open-loop interleaving is also analyzed indicating that the MHz CRM totem-pole PFC with voltage-mode control, open-loop interleaving, and turn-on instant synchronization can maintain critical mode operation with better stability compared to low frequency CRM PFC.

[1]  F. Lee,et al.  Evaluation and Application of 600 V GaN HEMT in Cascode Structure , 2014, IEEE Transactions on Power Electronics.

[2]  Fred C. Lee,et al.  Design and evaluation of GaN-based dual-phase interleaved MHz critical mode PFC converter , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[3]  M.M. Jovanovic,et al.  Review and Stability Analysis of PLL-Based Interleaving Control of DCM/CCM Boundary Boost PFC Converters , 2009, IEEE Transactions on Power Electronics.

[4]  Shuo Wang,et al.  DM EMI Noise Prediction for Constant On-Time, Critical Mode Power Factor Correction Converters , 2012, IEEE Transactions on Power Electronics.

[5]  M.M. Jovanovic,et al.  Open-Loop Control Methods for Interleaved DCM/CCM Boundary Boost PFC Converters , 2008, IEEE Transactions on Power Electronics.

[6]  Fred C. Lee,et al.  Common mode EMI reduction technique for interleaved MHz critical mode PFC converter with coupled inductor , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[7]  Milan M. Jovanovic,et al.  Evaluation of input current in the critical mode boost PFC converter for distributed power systems , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[8]  Johann W. Kolar,et al.  Self-adjusting input current ripple cancellation of coupled parallel connected hysteresis-controlled boost power factor correctors , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[9]  F. Lee,et al.  Package Parasitic Inductance Extraction and Simulation Model Development for the High-Voltage Cascode GaN HEMT , 2014, IEEE Transactions on Power Electronics.

[10]  Dushan Boroyevich,et al.  GaN-based high frequency totem-pole bridgeless PFC design with digital implementation , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).

[11]  Milan M. Jovanovic,et al.  A comparative study of soft-switched CCM boost rectifiers and interleaved variable-frequency DCM boost rectifier , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[12]  Fred C. Lee,et al.  Avoiding Si MOSFET Avalanche and Achieving Zero-Voltage Switching for Cascode GaN Devices , 2016, IEEE Transactions on Power Electronics.

[13]  Zhan Wang,et al.  High-efficiency True Bridgeless Totem Pole PFC based on GaN HEMT: Design Challenges and Cost-effective Solution , 2015 .

[14]  Liang Zhou.  99% Efficiency True-Bridgeless Totem-Pole PFC Based on GaN HEMTs , 2013 .

[15]  Fred C. Lee,et al.  Digital-Based Interleaving Control for GaN-Based MHz CRM Totem-Pole PFC , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[16]  Fred C. Lee,et al.  Design of GaN-based MHz totem-pole PFC rectifier , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[17]  M. S. Elmore.  Input current ripple cancellation in synchronized, parallel connected critically continuous boost converters , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[18]  F.C. Lee,et al.  High frequency investigation of single-switch CCM power factor correction converter , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[19]  Xiaojun Xu,et al.  A novel closed loop interleaving strategy of multiphase critical mode boost PFC converters , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[20]  Fred C. Lee,et al.  Analysis and filter design of differential mode EMI noise for GaN-based interleaved MHz critical mode PFC converter , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[21]  Fred C. Lee,et al.  Analytical Loss Model of High Voltage GaN HEMT in Cascode Configuration , 2013, IEEE Transactions on Power Electronics.

[22]  T. Ishii,et al.  Power factor correction using interleaving technique for critical mode switching converters , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).